feat(core): Add MIT Types in payment Intent (#9585)

crates/common_enums/src/enums.rs

@@ -9353,6 +9353,33 @@ pub enum TriggeredBy {
     External,
 }
 
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    Hash,
+    PartialEq,
+    serde::Deserialize,
+    serde::Serialize,
+    strum::Display,
+    strum::EnumString,
+    ToSchema,
+)]
+#[router_derive::diesel_enum(storage_type = "text")]
+#[serde(rename_all = "snake_case")]
+#[strum(serialize_all = "snake_case")]
+pub enum MitCategory {
+    /// A fixed purchase amount split into multiple scheduled payments until the total is paid.
+    Installment,
+    /// Merchant-initiated transaction using stored credentials, but not tied to a fixed schedule
+    Unscheduled,
+    /// Merchant-initiated payments that happen at regular intervals (usually the same amount each time).
+    Recurring,
+    /// A retried MIT after a previous transaction failed or was declined.
+    Resubmission,
+}
+
 #[derive(
     Clone,
     Copy,